The $\Delta H_f^{\circ}$ values (in $kJ \ mol^{-1}$) for graphite, diamond, and $C_{60}$ are respectively:

  • A
    $0 ; 1.9 ; 38.1$
  • B
    $1.8 ; 1.9 ; 38.1$
  • C
    $0 ; 0 ; 21.4$
  • D
    $1.8 ; 1.9 ; 2.0$

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